Improved machine for threading bolts



M. HINE. MACHINE FOR THBEADING BOLTS.

N0. l01,366. Patented Mar. 29, 1870.

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MERRIT HINE, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO C. COWLES & 00., OF SAME PLACE.

Letters Patent No. 101,366, dated March '29, 1870.

IMPROVED MACHINE FOR THREADING BOLTS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, MERRIT Hnve, of New Haven, in the county of New Haven and State of Connecticut, have invented a new Improvement in Machine for Threading Bolts; and I do hereby declare the following, when taken in connection with the accompanying drawings, and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute apart of this specification, and represent in- Figure 1, a. side view;

Figure 2, a top view; and in Figures 3, 4, 5, and (3, detached views, to illustrate the operation.

This invention relates to a machine for threading bolts, and consists in combining the threading-dies with the holding-dies, so that the mechanism which opens the holding-dies will throw back the threading- .dics and release and discharge the threaded bolt for the insertion of a second bolt.

' A is the bed-plate.

B, the threading device, which consists of three jaws, a, (see figs. 3, 4, and 6,) the said jaws pivoted at d, and arranged around a hollow mandrel, C, the said mandrel extcnding through the machine and supported in bearings l), and caused to revolve by the application of power thereto through the pulley D; D being a loose pulley on the same mandrel.

Around the mandrel a conical sleeve, E, is placed, with a pin, f, (see figs. 3 and 4,) running through a. slot in the mandrel, limiting the longitudinal movement of the sleeve E to the length of the said slot.

As the sleeve E is forced forward it raises the rear end of and closes the jaws, and when withdrawn opens the jaws.

F F are the holding jaws, seen enlarged at fig. 5, and are pivoted at i so as to grasp the bolt, as seen in broken lines, fig. 5, and they are closed by a lever, L, hung to the frame at l, the said lever having inclined sides, as seen in fig. 5, 'so that by the drawing of the lever between the rear end of the jaws, as denoted in broken lincs, figs. 1 and 5, the rear ends of the jaw levers are sprcad and the jaws closed, and vice versa.

From the said lever a connecting-rod, n, extends up and is connected at m to a sliding rod, N, the said rod N being fixed to a slide, P, arranged upon the rear end of the mandrel C, so that when the lever is drawn forward to close the jaws F the said slide is also drawn forward, as denoted in broken lines, fig 1.

. R is a lever, attached to'a rod, R, which connects by a fork, R, to the mandrel C, so that by drawing the lever B forward the mandrel, with the screw-cutting apparatus, will be forced toward the holding-dies in the usual manner.

This completes the construction or the machine; its operation is as follows:

A rod, 8, (see fig. 3,) is set into the mandrel, the said rod s being of such length, that when the bolt is fully cut, as seen in fig. 3, that is, has run into the cutting-dies the required distance,-the end of the bolt will strike the rod, the said rod bearing against the pin 1, which extends through the sleeve E and slot in the mandrel, and so that when the bolt is fully cut it will have pressed upon the rod and forced the sleeve 1*) back, as seen in fig. 4.

The bolt is placed and held between the jaws F, the die-holder B having been forced back, so that the sleeve E, striking the bearing immediately in its rear, or against another stop, the screw-cutting dies will be closed by their rear ends riding up the incline of the sleeve E, as from the posit-ion in fig. 4 to that in fig. 3; then the operator, connecting the power so as to cause'the mandrel and screw-cutting dies to revolve, takes hold of the lever It and draws the dies and mandrel forward until the dies engage upon the bolt blank, then they advance by the thread which they cut on the bolt until the bolt has, by striking the rod s, pressed the sleeve back to open the screw-cutting jaws, as seen in fig. 4.

1n griping the bolt blank, the lever L is drawn forward, and with it the slide 1, as denoted in broker: lines, fig. 1.

On the mandrel is fixed a collar, '1, in relation to which the slide 1 is set or adjusted on the rod N, so that as the mandrel with the cutting-dies reaches its extreme length on the bolt, the said collar '1 will have reached the slide P in its forward position.

The bolt having been completely out, the lever L is thrown back to open the holding-jaws, by which movement the slide P, striking the collar '1, forces the mandrel back, and with it. the sleeve E and the screwcutting jaws; the sleeve E striking a hearing or stop before the mandrel reaches its extreme rear movement, is arrested when in the position, say in fig. 4; the mandrel continuing its movement draws the rear end of the dies or die-holders upon the incline of the sleeve, as seen in fig. 3, ready for a secondoporation.

By this construction, so soon as the thread is commenced on one bolt, the operator can leave his machine, inasmuch as the dies will be automatically opened, and thus he may be enabled to attend several machines.

I do not claim the arrangement of the inclined sleeve and screw-outing dies and mandrel, as such,.I am aware, is not new.

I claim, as my invention- 1. In combination with the mandrel C, screw-cutting dies at, and inclined sleeve, operating as described, the bolt-holding jaws F F and lever L, substantially as described.

2.'In combination with the subject-matter of the first clause of claim, the rod N and slide P, with the collar 1 arranged on themandrel, substantially in the manner and for the purpose described.

MERRIT HINE.

Witnesses:

A. J. Trnnlrrs, J. H. SHUMWAY. 

